cords

The cotton, hemp, linen. or silk cords or bands,
of varying thicknesses, which extend across the
backs of the gathered sections and are used in
sewing books through the folds. They are either
sunk into saw cuts in the sections, as in RECESSED-CORD SEWING
. or rest against the sections to form the raised
cords or bands used inFLEXIBLE SEWING . See
also: BANDS (1)
;TAPES ;THONGS (2) ;WEBBING(S) (1) .